Tool joint



New; 18 1924. 1,515,617 C. D. REYNOLDS ET AL TOOL oIiIT Filed Sent. 29. 1922 flare/1 e12 Fe M5 Patented Nov. 18, 1924. d

UNITED STATES 1,515,617 PATENT OFFICE.-

moon JO'INT.

Application filed September 29, 1922. Serial No. 591m To all whom it may concern:

Be it known that we, CLARENCE D. REYN- onns and CHARLES B, REYNOLDS, citizens of the United States, residing a Whittier, in

the county of Los Angeles and State of Cali fornia, have invented new anduseful Improvementsin Tool Joints, of which the following is a specification.

This invention relates to joints for strings of pipe sections, and more particularly to joints for deep well drilling pipes. It is an object of the present invention to provide an extremely simple, practicable and substantial form of joint consisting of a pin and inner member with coarse pitch threads and an outer socket or box member complementary thereto, these members being provided with complementary ground jointforming peripheral shoulders to form a tight abutment between the two members as well as to hold them in attached relation.

Another object of the invention is to .provide a deep well tool joint the inner or pin member of which is providedwith a water bore having means for imparting to the flowing water and mud a gyrating movement to maintain agitation of the circulating fluid. Another object is to provide an improved deep well tool joint havlng provis'ion for the removal of the internally threaded collar end and the rethreading of the remainder of the collar, thus to secure a joint member whose life of service is increased by the rethreading provision.

Other objects and advantages will be made manifest in the following specification of an embodiment of the. invention illustrated in the accompanying drawings, wherein Figure 1 is a longitudinal central section of the improved joint to which areattached sections of pipe;

Figure2 1s a side elevation ofthe inner or pin member of the joint Figure 3 is a cross section of the tapered pin, showing the rifiing.

The joint of the present invention consists of an upper socket member 2 having a substantial, lower end provided with a coarse pitch thread device 3 preferably of conical form, and the lower end of member 2 is in-' ternallHonically turned and ground out as at 4. elongated form and its upper end is internally bored and threaded as at 5 to forma reception of the contiguous collar for the e socket member 2 is of somewhat end of a section of pipe P. The threads 5 extend into the bore a suflicient distance to receive the threaded end of the pipe P securely. Because of the great stresses, strains and abuse to which deep well pipe joints are subjected, the pipe receiving threads and the of use as to be-rendered useless, and an object of the invention is to provide for the removal of the initially threaded hollow end of the member 2 when this has been rendered useless and to provide a suflicient length of bore for rethreading. Such ex? tra length of bore is indicated at 6, and when the initial end or collar portion has been destroyedit may be turned off and the bored portion 6 is then threaded ready for the reception of a pipe end.

Complementary to the tapered threads 3 of the socket member, there is provided a pin member 10 of similar conical form and similar thread means, this pin being formed upon one endof a sleeve 11 which is internally threaded at 12 to receive a contiguous pipe end P. The end face 13 of the sleeve 11 from which projects the pin 10 has its corner beveled, as at '14, complementary to the bell or bevel of the member 2, so that when the two joint members are secured together the complementary bevels 4 and 14. will jam tightly on each other and form a rigid as well as water-tight joint between end meeting faces.

A feature of the invention is the provi-i sion through the pin 10 of a bore 15 which serves as aconduit for .the circulating mud or water through the string of pipe, and it is very desirable to provide means for obtaining a swirling or rotating movement through the column of liquid to maintain agitation collar end of the joint member 2 are usually so distorted after a period swirling or rotating movement of the column of liquid passing through therified bore of the pin 10 serves also to impart a turning movement to the pin 10, tending to keep pin 10 and socket member 2 securely locked together. It is not uncommon that the string of casings in deep wells in the drilling operations become uncoupled, and the swirling movement of the column of liquid tends to prevent such uncoupling; This we accomplish by means of helical 'rifling 16 along the surface of the bore 15 of the pin. 9 From the foregoing, it will be seen that ticable, eflicient, inexpensive and durable form of deep well tool joint.

Itnis obvious thatby the present type of tapered thread box and tapered thread 'pin,

it will be unnecessary to employ or provide for any end countersink or recess in the box' a at 1ts recelvmg end slnce the tapered threads will readily guide axial position. p a

It is to be understood that thepresent improvement may be incorporated in any of desirable elements in a string of tool parts, for instance, the improvements may be incorporated in drill collars as well as in the the parts into a I r a pipe receiving joints.

"Further embodiments, modifications and variations may be resorted to within the spirit of the invention as here claimed.

bore being provided with means for whirl- .ing'liquid flowing therethrou h.

2. In a tool joint, a mem er having an externally threaded pin-portion which is longitudinally bored, the surface of said borebeing provided with rifling {or whirling liquid flowing therethrough. o.

In testimony whereof we have signed our names to this specification CLARENCE D. REYNOLDS.- GHARLES, B.-REYNOLDS. 

